Gauge



Si "w June 4, 1946. l E. c. Hom-0N GAUGE Filed Jan. 2, 1943 lNvENToRMmmm.

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Patented Juneu 4, 1946 i GAUGE Erwin CrHorton; Hamburg, NLY., assignertoTrico- Products Corporation, Buffalo, N. Y.

Application JanuaryZ, 1943, Serial No. 471,153

7`Claims. (Cl. 33-172) This invention `relates to gauges of themicrometer type for use in gauging the depth of countersinks, grooves,offsets and the like. I

The object of the instant invention is to provide a gauginginstrument ofthe class described which makes possible the `rapid and extremely fromthe left of Fig. 1, partly in section, and also.

in gauging position relativeyto a workpiece;

Fig. 3 is a detailed viewof the work. engaging part of the inventionillustrating one oi the particular advantages thereof; and Fig. lli'isa. detailed view of a modied form of plunger tipillustrating another,application of the invention. y

Referring more particularly to the drawing, the numeral II) designates abox like housing or casing for the gauging mechanism, and II'indicatesthe removable cover thereof having a window I2 therein. Plus and minustolerance indicators I3 and I4 are visible throughthe Window and arehereindepicted as elongated fingers mounted on the underside of thecover by friction held studs or rivets I5. Adjustments of thesetolerance indicators to the various desired tolerances may be made byturning the, studs I5 with any suitable instrument such as a screwdriver. A pointer I8 operates in the Window to indicate the .dimensionalcharacteristics ofthe workpiece, and thisl pointer is operativelyconnected to a work engaging plunger Ill by movement amplifying leveragegenerally shown as 23. The plunger is spring projected but normally heldretracted by a device which is rendered inoperative upon depressing arelease button 2| to perform the gauging operation, all of which is morefully described in Patent No. 2,362,203, granted November 7, 1944.

The plunger I9 is provided with a threaded end opening 22 for receivingvariously shaped work engaging portions or tips 23. In this preferredexemplification of the invention as illustrated by Figs. 1, 2 and 3, thetip 23 comprises a fastened to a stud 25 which is screw threaded intothe openingr22, and a workpiece contacting ball 23 secured to the outerend thereof.

The housing Iii is mounted on acarrier 29 by means of the screws 3|] andhas a handle' 3| extending from the right side of the housing adjacentthe release button'ZI, as viewedin Fig. 2, by Whichithe gauge may easilybe held and operated With one hand thereby leaving theother. hand free.tion with the release button 2| that the operator may conveniently usethe thumb or nger of the hand with which he is holding thegauge to pressthe button 2| to release the plungerffor its gauging operation. Thecarrier 29 has` a guard 32 extending' from the leftu side o fftlcel`housing |53, preferably opposite to said handle' and includes a 'rigidlybraced vertical workpiece contacting portion or rest 33. spaced from..the

housing i3, having an opening 3d throughwhich the tip 23 extends and aworkpiece contacting" face' of accurate plane form, Valthough otherforms or shapes `may be used depending upon' the surfaceV oi" theworkpiece. With this prepreferably as shown and described, may: be"

formed in various other `ways such as vforfeib" ample, the handle 3| andworkpiece` contacting portion` 33 may be formed` as integral p-artsofthe housing I0.

In the illustrated embodiment the invention has been illustrated asiby'Figs. l, 2, and 3, inv

gauging `relation with a workpiece `.'ihaving a drilled countersink 3S.In its operation `when itis desired to gaugethe depthfof the countersink39 the operator' places the face H35 flat against the workpiece sothatthe ball 28`registers with the countersink. 'The operator Athendepresses the button 2| releasing the plunger to allow the ball to seatitself in the countersink thereby operating the amplifying leverage 2|)to actuate the pointer IB which indicates the dimensionalcharacteristics of the countersink.

A particular feature of the invention is illustrated more clearly byFig. 3 wherein it will be observed that it is not necessary for theoperator of the instrument to place it so that the ball 28 registersexactly with the center of the countersink. Should it be placed thereinat an off center position, as illustrated by the broken line posi- Thehandle 3| is so placed-in relation, the flexible neck-forming wire orrod 24 A A modified form of the invention is-illustrated in Fig. 4wherein the flexible rod and ball tip y has been replaced by anon-flexible tip 40 for the purpose of gauging the depth ofy a groove 4|in a workpiece 42. Thus it may be seen that by varying the tip or workcontacting element various other gauging operations may thereby be madepossible.

Although only the preferred embodiments of the invention have been shownand described, it

y will beapparent to those skilled in the art that the'invention is notnecessarily so limited but that various changes maybe made thereinwithout departing from the spirit and scope of the appended claims.

` What is claimed is:

1. A depth gauge comprising a housing having 4 gauging the work,thehandle vextending lengthwise of the body and in substantial alinementwith but oppositely from the plunger, the` work engaging face of therest lying in a plane extending transversely of the longitudinal axis ofthe handle whereby the rest may be guidingly placed against the workfrom the handle, and means normally holding the plunger retracted andvembodying a plunger release part disposed adjacent the handle to beactuated by a, finger of the hand grasping the handle for thefunctioning of saidurging means, f

' 4. A portable hand tool for gauging a recess in a workpiece comprisinga micrometer indicator having a work engaging plunger with spring `meansurging the latter against the workpiece, Va handle extending from oneside of the micrometer Aindicator in a direction opposite from theplunger, a workrest adjacent the plunger for supporting the toolagainstthe workpiece for gauging operation, releasable spring meansoperable for holding said plunger normally retracted in counteraction ofthe first spring means, and manually operable means accessibe to alinger of the hand grasping the handle for releasingl the sec- Yondspring means to enable the first spring means therein means forindicating dimensional char- Y acteristics of workpieces, a plungerprojecting from the housing for actuating said means, a carrier for saidhousing having a handle normally disposed on the side of the housingopposite the plunger and in line therewith and a workrest on :theplunger side of the housing spaced outwardly therefrom and adapted torest against a workpiece for accurately relating the gauge against thelatter, said plunger having a, tip mounted bya reduced flexible shank,which latter extends freely through an opening in said workrest forlateral deflection in engaging the workpiece when mutually placedthereagainst.

2. A countersink gauge comprising a housing, means in said housing forindicating dimensional characteristics of acountersink, flexible meansreleasably held inoperative for actuating said indicator means whenreleased, means for releasing said flexible means, a carrier for saidhousing having aA handle adjacentsaid releasing meansy andl a ,work restportion having an opening through Ywhich said flexible means projectsfor Aengagementfwith a countersink upon its release,

said'flexible means.A being adapted to find the center of thecountersink by lateral deflection within the opening of the rest portionwith the latter serving to limit such lateral deflection.

3. A depth gauge tool comprising an elongated body having a work rest atone end and a handle at the 4opposite end with an intermediate seatportion, micrometer gauging mechanism supported, by the intermediateseat portion and having a work engaging plunger with means urging thelatter `to a work engaging position for projecting the plunger beyondthe workrestV for gauging operation. Y Y

5. A portable hand tool for gauging a recess in a workpiece comprising amicrometer indicator having a work engaging plunger,Y a handle extendingfrorn one side of the micrometer indicator in a direction opposite fromthe plunger, and a Workrest carried by and spaced from the opposite sideof the micrometer indicator, a ball tip flexiblyconnected to saidplunger, said workrest having an opening through which said ball tipfreely extends for movement laterally in finding` the correct depth ofthe recess when displaced radially therefrom.

6. A gauge having a micrometer indicating 7. A gauge having a casing, amicrometerindicating means therein and including a connected plungerprojecting from the casing, a work engaging tip, a relatively reducedspring cormector mounting the tip on the plunger and providing aflexible neck to enable off-center displacement of the tip with respectto the longitudinal axis of the plunger during axial movement of thevplunger with the tip and the connector as a unit, and a guard part rigidwith the casing and havingan opening through andV beyond which theV tipprojects.

ERWIN c. HoR'roN

